Malicious PDF — malware analysis report

Static analysis result for SHA-256 d994d60692df1474…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 12:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: aa80a62e43e61afc445c6b11e4d4fb74 SHA-1: 853020cbc01103d2609a33d5b6e34e32ae4153f2 SHA-256: d994d60692df14749b3d8573d3d5675f494e6b928c81c968b25ae7e78ffbed0f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/uplcv?utm_term=god+of+war+apk+file+download PDF link annotation
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614180da492e3---34880529602.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/xitafudijifitiwupi.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/gonigawewigutijavena.pdfIn PDF document text
    • http://isitekmuhendislik.com/userfiles/file/76275357157.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/21383958308.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dba7891f1---numorozetatubepiva.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/fivomesepor.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109120757397334.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4ec4231b8---bipofukogigejugidape.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/98506899472.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/12706562144.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tikepumanavixofegij.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/98106666557.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/58379865e42decf2a993797c603270c6/tujabiguvetogidosur.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/25604340436.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/gedafiziwubok.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/rovipefebufofepuvogiben.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/22305097929.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/koxefuju.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/35016666206.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/falesazakafeg.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/memusufafojilofubudikema.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/6183209791.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/41797609935.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/22833024172.pdfIn PDF document text
    • http://raczcsalad.hu/files/64846750548.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 10440 bytes
SHA-256: a3aaf06ee341a2ebb839b8063ca68adaa465288400ac4a868822b1769132e7e6
font_01_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7E 17952 bytes
SHA-256: dc904c26d7665919d12f1e9f29cab6af989c6ae68e5ab1927538804ed7208307